Question

10. Circle True or False for each of the questions below.
1. If the null hypothesis states that there is no difference
between the mean income of males and the
mean income of females, then the test is one-tailed.
True False
2. If the null hypothesis states that there is no difference
between the mean net income retail stores in
Chicago and New York City, then the test is two-tailed.
True False
3. If we are testing for the difference between two population
means, it is assumed that the sample
observations from one population are independent of the sample
observations from the other
population.
True False
4. The coefficient of determination is the square root of the
coefficient of correlation.
True False
5. If the coefficient of correlation is -0.90, the coefficient of
determination is -0.81.
True False
6. A scatter diagram is a graph that portrays the correlation
between a dependent variable and an
independent variable.
True False
7. An economist is interested in predicting the unemployment rate
based on gross domestic product.
Since the economist is interested in predicting unemployment, the
independent variable is gross
domestic product.
True False
8. Multiple regression analysis is used when one independent
variable is used to predict values of two
or more dependent variables.
True False